<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Template Title</title>
    </head>
    <body>
        <p>这个是OSI的7层模型介绍!</p>
        <ul>
        {% for item in osi %}
            <li>{{ item }}</li>
        {% endfor %}
        </ul>
    </body>

</html>
